Improvement in circular-saw mills



@titled garnet JAMES It., LUCE, OE STEVENS POINT, WISCONSIN.

Letters Patent N 105,100, dated July 5, 1870.

IMPROVEMENT IN CIRCULAR-SAW MILLS.

The Schedule referred to in these Letters Patent and making part of the same To all whom it may concern Be it known that I, JAMES R. LUCE, ot' Stevens Point, in the county of Portage and in the State of Wisconsin, have invented certain new and useful Improvements in Sawing-Machines and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accomcompanying drawing -and to the letters of reference marked thereon making a part of this specification.

My invention relates to the feeding-mechanism of a sawing-machine, and consists in two tapering friction-rollers placed on two parallel shafts, and connected by two thin rollers on a movable diagonal shaft, wheref by the speed of the feeding-carriage is regulated, and also in the arrangement of 'the devices whereby the motion of the feed is reversed, so as to feed either to or from the` saw.

In order to enable others-skilled in the art to which my invention appertains to make and use the same, I will now proceed to describe its construction and operar tion, referring to the annexed drawing, in which- Figure l is a side elevation, and

Figure 2 a plan-view of my machine.

A represents the frame of my machine, upon which, in snitablejournal-boxes, is placed a shaft, B, carrying at one end the saw C.

Motion is communicated to the saw-shaft B by means of a belt, D, connecting a pulley .on the same with a wheel or pulley on the main shaft E, this shaft being turned by hand, steam,` or any other known motive power.

In front of the saw-shaft B, on the frame A, is another shaft, G, which has a stationaryijournal-box at the end furthest from the saw, but at the end nearest thev saw its journal-box a is movable, as-will be hereinafter described, for the purpose of throwing said shaft in and out of gear with` the saw-shaft.

On the shaft G is placed a tapering roller, H, which is touched by a thin roller, I, on the shaft J.

This latter shaft is placed diagonally ou the frame A, in movable journal-boxes, b b.

The journal-boxes b b are each provided with an adjustable screw, o, and spring, d, which operate in opposite directions, so as to draw the roller I up to the tapering roller H. 'f

At the opposite end of the shaft J is placed a similar roller, I', which, by the spring d at that journal box b, is drawn close up to another' tapering roller, H', placedvupon a shaft, G', running in stationary journal-boxes on the frame A, parallel with the shaft G. i v Y At the outer end of the shaft G', on the same` side as the saw C, is a pinion, e, which may gear with a saw-carriage, or other suitable mechanism or device for carrying the lumber to or from the saw.

' rI he rollers Il on the shaft J are so arranged that, whenthe roller I touches the larger end on the taper ing roller H, the roller I will touch the smaller end of the tapering roller H', and eine versa.

The saw running at a uniform speed, the feed-pinion c can be made to revolve faster or slower, at will, by changing the position of tbe rollers I I' on the tapering rollers H H', because the nearer the roller I is brought to the smaller end of the tapering roller H, the less speed will the feed-pinion have', and the nearer said roller is brought to the larger end the greater will the speed be.

The rollers I I are at all times brought with equal pressure on the tapering rollers H H by means of the springs d d and movable boxes b b.

The change in the position of saidrollers is effected by means of a lever, K, pivoted to the under side `of the frame A, and its front end attached to a grooved pulley, L, on the shaft J.A 'By the use of this lever the shaftJ can be moved to either end, the boxes b b being hollow for that purpose.

Upon the saw-shaft B are placed two rollers, M M', and upon the shaft G are two corresponding rollers, N N', the roller N' being, however, largerthan the .roller N, so that, when the former is brought in contact with the rollerv M', the latter will not touch the roller M.

The rollers M and N are brought in contact with each other by means of alever, O, pivoted on the inside of the frame A, said lever being provided with an arm, f, which is,- by a rod, g, connected with the journal-box a. By pressing the lever O backward, motion is thus communicated to the shaft G, and, through the means already described, to the feed-pinion e, feeding the lumber to the saw.

As soon as the pressureis removed from the lever O, a spring, h, with set-screw, "i, attached to the front end of the movable journal-box a, throws the roller N away from the roller M', vinstantaneously stopping the feed.

When in this position the feed is reversed by the following means:

A spring, P, secured on the frame A, supports perpendicularly a small frame, R, between the rollers M N, the lower end of said frame having a hook, k, in which rests an arm, m, from the lever O.l

In the frame R, above the rollers M N, is a small roller, S. By bearing forward onthe lever O the frame It is drawn downward, so that the roller S will come in contact with both of the rollers M and N, and conscquently turn the feedin the opposite direction.

A s soon as the forward pressure .isl removed from the lever'O, the spring I carries the frameR upward, removing the roller S from the rollers MN, and stopping the feed Having thus fully described my invention,

What I claim as new, and desire to secure by Letters Patent, is-

1. The combination of the parallel shafts GrA G', with tapering pulleys 'H H', and the diagonal shaft J with pulleys I I', all constructed and arranged to operate u substantially as' and for the purposes herein set forth.

2. The arrangement of the movable journal-boxes b b, set-srews c c, and springs d substantially as and for the purposes herein set forth. 3. In combination with the shaft J, rollers I I,jonr nal-boxes b b, and springs d d, thelever K and grooved pulley L, substantially as and for the purposes herein set forth.

4. The arrangement of thelever 0, with arm f, rod g, movable journal-box a, and spring h, al1 operating substantiallyas and for the purposes herein set forth.

5. lhe arrangement ofthe lever O, arm m, hook` k, frame R, roller S, and spring P, all constructed and operating substantially as andfor the purposes herein set forth.

In testimony that I claim the foregoing, I have hereunto set my hand this 26th day of November, 1869.

JAMES R. LUCE.

Witnesses:

H. D. MoUULLocH, J emr OADMAN. 

